Along with many idol groups, Ailee is one of the artists performing at the 'DMZ Peace Concert.' All participating artists gathered on stage for a group song rehearsal. Everyone was singing along till the end where Ailee hit the high note strong and precise with her powerful and full voice.

Cosmic Girls member who stood at the upper stage couldn't hide their shock and MAMAMOO's Solar who stood on the same platform as Ailee had her eyes widen too, as she looked at the solo artist.